Improved thrashing-machine



J. S. FULTON. THRESHING MACHINE.

No 103,866. Patented June 7, 1870..

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ttuweg To all whom it may concern:

JOHNS, FULTON, osent.LATIN,` NEWYORK.-

Letters .Patent No.`103,8`66, dated June 7, 1870.

Heyy- IMPROVED THRASHING-MACHINE.

The Schedule referred to m these Lettera Parent and making part of thesame- Be it known that I, JOHN S. FULTON, of Gallatin, in the conntyofColumbia and State of New York-,have invented a new and ImprovedThrashing-Machine; and I do hereby declare that-the following is a full,clear, and exact description thereof, which will enable others skilledinthe art to make and use the same, reference being had to theaccompanying drawing forming part Of this specification, in which--Figure l represents a plan or top view of my im'- provedthrashing-machine, without the concave, which is shown in Figure 2 in aninverted plan view.

'Figures and 4 are vertical transverse sections of` respectively, abovethe saine, showing the concave, and below the thrashing-cylinder.

lSimilar letters of' reference indicate corresponding parts.

This invention relates to a new thrashing-machine,

l into which the straw is fed transversely,"so thatit will not in theleast be injured or broken bythe thrashing process, which will be verycomplete and satisfactory.

By leaving the' straw unbroken, the value of the same is greatlyincreased, and, consequently, also the value of the machine. 4

The invention consists in the arrangement of the concave, which has aseries of unbroken ribs and grooves, in which the straw can be rolledwithout being broken.

lhe invention also consists in making said ribs of unequal size, so asto gradually obtain the desired action, which, if sudden, mightbeinjurions to the grain.

A in the drawing represents the frame of the machine. `In it is hung theshaft ofthe horizontal thrashing-cylinderB, which is revolved bysuitable machinery.

On the'cylinder are arranged, at certain equal distances apart,projecting ribs a a, which are perfectly straight, smooth, and parallelwith the axis Ot' the cylinder. Onthe frame is supported, either abovethe thrashing-cylinder, as in fig. 3, or below the same, the' concave O,which is a block, with a concave inner face.

In this concave fface are arranged longitudinal ribs b '11, as shown,the said ribsheing also unbroken and' smooth, as those ofthe cylinder.v

l' 4and thoroughly.

The ribs in the concave are not all of equal size, but increasegradually toward the middle, as is clearly shown in tig. 1, and againfrom the middle toward the Outer or vdischarge end. In the middle is aseparate section of equal-sized ribs.

The several (three or more) sections are, as in fig. Y `2, a small spaceapart.

The 'straw is .fed transversely, that is 'to say, parallel with theribs,'and the gradually-increasing ribs.

of the first section roll out the grain gradually.

1 In the space between they rst and second sections u the ears can bechanged, so that they will not always be in the rame position, and thesecond section, consisting of smaller ribs, will separate almost allgrain left by the rst section.

lhethird section If the concave is used below the cylinder, it is placedupon springs c c, which hold it against the cylinder In that case a cap,D, should be placed over the cvlinder, as shown.

The grain and straw are` discharged iom the machine in good Order,causing no loss of the products OE the farms.

Having thus described my invention, I claim as new and Patent-.

' 1. The cylinder B having longitudinal smooth-faced ribs a a, parallelto its axis, in combination with a concave, having correspondinglongitudinal smoothfaced-,ribs thereon, so as toroll the straw with aslittle as possible of rubbing-friction, toavoid cracking the grain orbreaking the straw, 'all asset forth.

2. A concave, C', Of a thrashing-machine, having longitudinal-ribsthereon, running at right anglesto the plane of rotation of thecylinder, and arranged in three sets, the -first having ribs increasingin size toward the center, 'themiddle having ribs of uniform size, andthe last set increasing in size to the outlet,

all as shown and described. VJOHN S. FULTON.

Witnesses:

FRANKLIN SAGENDORF, J OnN A. STADE.

perfecte the operation graduallyA desire to secure by Letters

